MuscleNerd has finally released RedSn0w 0.9.14b1 to downgrade iPhone 3GS / 3G 06.15.00 baseband to 05.13.04 baseband which can be unlocked with UltraSn0w and also fixes the GPS, stock firmware issues incurred on iPhone 3GS/3G due to iPad baseband 06.15.00.

MuscleNerd, in tweet, hints that they are working on downgrading Baseband 06.15.00 to 05.13.04. In a reply to one of his followers, Musclenerd says that they are working on downgrade iPhone 3GS baseband 06.15.00 to 05.13.04 rather than an unlock for baseband 06.15.02, 05.14.02, or 05.15.04.

Dev-Team has just released UltraSn0w unlock for iOS 4.0 baseband 05.13.04 on iPhone 3GS and iPhone 3G. It means you can unlock iOS 4 05.13.04 baseband with Ultrasn0w. In this guide you’ll learn how to unlock baseband 05.13.04 using UltraSn0w.

Unlock iPhone 4 iOS 4.0 on Baseband 05.13.04 is possible. This is what MuscleNerd has confirmed in a response to a query via Twitter. Unlock for iOS 4.0 (formerly known as iPhone OS 4), baseband 05.13.0x, 05.12.01 is ready (Update: available now check the updates at the bottom) and will arrive next week (possibly even [...]